Why is it important to study sleep?
Sleep is like an open window that allows researcher to see the basic physiological activities of our brain without the interference of any other confounding factors (like paying attention to a task, tiredness, or motivation).
How do we study sleep?
We use a cap that is composed of 64 electrodes. These electrodes are able to record the natural activity of brain cells while you are asleep, because we fill them up with a gel that conducts the electrical activity of neurons. Easy, right?